Summary of Significant Accounting Policies Recently Issued Accounting Standards (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020	Dec. 18, 2020	Jul. 31, 2020
Long-term Debt	$ 2,958,188	$ 2,414,701	$ 2,958,188	$ 2,414,701		$ 2,444,248
Operating Lease, Right-of-Use Asset	211,497	217,318	211,497	217,318		225,744
Operating Lease, Liability, Noncurrent	196,256	209,321	196,256	209,321		217,542
Operating Lease, Liability, Current	37,687	34,996	37,687	34,996		36,604
Interest Rate Cash Flow Hedge Liability at Fair Value	12,938	21,013	12,938	21,013		22,510
Debt Instrument, Face Amount					$ 575,000
Asset Impairment Charges	0	28,372	0	28,372
Goodwill
Asset Impairment Charges				25,700
Finite-Lived Intangible Assets
Asset Impairment Charges				2,700
EPR Secured Notes [Member]
Long-term Debt	114,162	114,162	114,162	114,162		114,162
Notes and Loans Payable	136,112		136,112
Debt Instrument, Fair Value Disclosure	199,426		199,426
EB-5 Development Notes [Member]
Long-term Debt	51,500	51,500	51,500	51,500		51,500
Notes and Loans Payable	49,774		49,774
Debt Instrument, Fair Value Disclosure	51,069		51,069
6.25% Notes [Member]
Long-term Debt	600,000	$ 0	600,000	$ 0		$ 600,000
Debt Instrument, Fair Value Disclosure	638,592		638,592
0.0% Convertible Notes
Long-term Debt	472,757		472,757
Debt Instrument, Fair Value Disclosure	$ 612,553		$ 612,553